Fans shouldn't expect a photo of Dimitri any time soon, though.
"We'd like to allow our kids to make their own choices on whether to have a life in the public eye or not," Kutcher told A Plus. "We don't want to make the choice for them."
Kunis, 33, and Kutcher, 38, are already parents to 2-year-old daughter, Wyatt Isabelle, who was born in October 2014.
Kutcher accidentally revealed the gender of their baby while on the Today Show promoting his Netflix show, "The Ranch."
"(Wyatt) points to Mila and she's like, 'baby brother' when she points to the belly and then she points to dad and she goes, 'Beer,'" Kutcher said. "So I think she gets there's something in the belly, but I don't quite think that she knows that it's not going to be a plastic doll yet."
The couple were married in July 2015 after dating since 2012.